Improvement in thill-couplings



UNITED STATES PATENT CEEIoE.

ABIEZER M. TROY, OF JUDD, *WISCONSIN IMPROVEMENT IN THILL-COUPLINGS.

Specification forming part of Letters Patent No. 158,544, dated January5, 1875 application filed l November 14, 1874.

To all whom it may concern:

Be it known that I, ABIEZER M. TROY, of Judd, in the county of Green andState of Wisconsin, have invented certain new and useful Improvements inThill-Ooupling; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use it,reference being had to the accompanying drawings, which form part ofthis speciiication.

My invention relates to an improvement in thill-couplings; and itconsists vin forming the blocks by which the thills are fastened to theaxle in two pieces, one of which is dovetailed into the other, and heldin position by means of a screw-bolt. It also consists in'forming asocket in the end of the thill, so that it can be readily attached anddetached from :the coupling, all of which will be more fully describedhereafter.

a represents a metal block, by means of which the thills are fastened tothe axle. Upon one side of this block, at one end, is formed an ear orextension, b, in the inner side of which is formed a socket, c. In theopposite end ofthe block there is formed a dovet-ailed recess, d, inwhich is placed the detachable block g. This block has also an ear, b',having a socket, c', in its inner side, and has the two extensions eprojecting outward from its side, which tit over the top and bottomofthe block a, so as .stiften and support the block g in position, theupper extension resting siinply on the top of theblock a, while thelower one fits in a recess in its under side, made to receive it.Passing through these two blocks is the screw-rod h, which holds the twoblocks together, and which draws'the detachable block g toward the onea, like the jaws of a vise, so as to clamp the ends of the thills inbetween the two ears b b. In the neck ofthe screw is formed a groove, 1,and down through the block is passed a pin, 2, which prevents anylateral motion to the screw, but allows it to revolve freely around.Upon each side of the rear end of the part j is formed a conicalprojection, 3, which t in the two sockets in the ears, and upon whichcomes the whole draft of the vehicle. vOne of these projections has twonotches, 4, cut in its outer end, which correspond to the notch 5 in theside of the socket c, whereby the part j can be taken out from betweenthe two ears without having to move back the block g so far. The rearends of the thills l are made hollow, or have a socket formed in them,into which the front ends. of the parts j are thrust, vand securely heldby means of the cam (i, which extends through the thill and catches in anotch formed in the side of the part j. This cam has a head, 7, formedupon one end, so that it can be easily operated by hand, and has aset-screw, 8, passing through it, so that it can be prevented fromturning. There is also a groove cut in tle circumference of this cam,and a pin passed through it, so as to hold it in position, inthe i samemanner as the screw-bolt. By turning this cam the thills can beinstantly detached from the coupling without in any manner loosening anypart of the coupling itself.

Having thus described my invention, I claim- 1. The combination of theblock a, having the recess d, ear b, and notch 5, with the block g,having the ear b', and the two extensions 6,- the screw-bolt h, pin 2,and part j 3, all'to operate'substantially as set forth.

2.- The combination of the block a, having a dovetailed recess in oneend, with the block g, made to lit in this recess, and provided with thetwo extensions c, substantially as shown.

3. The combination of the thills l, having hollow ends, with the part jand cam 6, provided with the head 7 and set-screw 8, substantially asspecified.

In testimony that I claim the foregoing I have hereunto set my hand this28thday of October, 1874:.

ABIEZER M. TROY.

Witnesses:

B. F. DARLE, D. WITMER.

